public static DecoratedText Create(string text)
{
if (text.Contains("gk_"))
{
foreach (string greekLetter in Funcs.GetGreekLetters())
{
text = text.Replace("gk_" + greekLetter, Funcs.GetGreekLetter(greekLetter));
}
}
if (text.StartsWith("#"))
{
return(new NormalText(MathyConstants.GetSymbol(text.Substring(1))));
}
else if (text.IndexOf('_') == -1)
{
return(new NormalText(text));
}
else if (text.IndexOf("__") == -1)
{
return(new SubscriptedText(text));
}
else
{
return(new SuperscriptedText(text));
}
}
protected string GetValueString(object value)
{
if (value == null)
{
return("空值");
}
else if (value.GetType().IsArray)
{
return(string.Format("长度为{0}的数组", ((Array)value).Length));
}
else if (value.Equals(double.PositiveInfinity))
{
return(MathyConstants.GetSymbol("posinf"));
}
else if (value.Equals(double.NegativeInfinity))
{
return(MathyConstants.GetSymbol("neginf"));
}
else if (value is Matrix)
{
Matrix m = value as Matrix;
return(string.Format("{0}*{1}矩阵", m.RowCount, m.ColumnCount));
}
else if (value is Bitmap)
{
return("图片");
}
else if (value is VariableContextExpression)
{
return("表达式");
}
else
{
return(value.ToString());
}
}